Preliminary cytogenetic study of Ctenopoma kingsleyae from Esa-Odo water reservoir, Osun State, Nigeria

Ctenopoma kingsleyae belongs to the family Anabantidae covers a wide geographic region. It has been morphologically described by a number of authors, yet it is lacking in adequate cytogenetic information, which is a setback to understanding its karyotypic evolution. This study, therefore, describes the karyotype of C. kingsleyae (n = 10) from Esa-Odo, Reservoir, Osun State, Nigeria. Metaphase chromosome spread was obtained from the gills of fish after intraperitoneal injection with 0.05% colchicines. Slides prepared were stained with Giemsa stain, images of metaphase spread were taken digitally and a karyogram was prepared. The study revealed a karyotypic formula of 2n = 48t with uniarmed chromosomes. This study has provided needful information on C. kingsleyae karyotype and will serve as the basis for further study on its evolution, genetic resource management and production.